磕頭

to kowtow (traditional greeting, esp. to a superior, involving kneeling and pressing one's forehead to the ground)

to tap / to knock (against sth hard) / to knock (mud from boots, ashes from a pipe etc)

variant of 嗑[ke4]

head / hair style / the top / end / beginning or end / a stub / remnant / chief / boss / side / aspect / first / leading / classifier for pigs or livestock / CL:個|个[ge4]

suffix for nouns

lit. to kowtow like grinding garlic (idiom) / fig. to pound the ground with one's head